And who's to say God wouldn't just rig the election? After all, he is supposedly all-powerful. Which also means he wouldn't just bow down and let Satan rule the universe in the event of Satan winning the vote.

Also, an election would only be fair if it included all the intelligent species in the universe. Taking that into account, I highly doubt humanity would have any impact on the outcome of the vote at all. There must be tons and tons of intelligent lifeforms throughout the billions of galaxies that exist, and we only make up a tiny percentage of that population. It wouldn't really matter who anybody on this planet voted for.